Topping
1/2 cup packed brown sugar
3 tablespoons flour
2 teaspoons cinnamon
2 tablespoons butter
3/4 cup chopped walnuts

Batter
2 cups flour
1 teaspoon baking powder
1 teaspoon soda
1/2 teaspoon salt
1/2 cup butter
1 cup sugar
2 teaspoons grated lemon rind
3 eggs
1 cup sour cream
2 cups Florida blueberries

Prepare topping -- combine all ingredients until mixture resembles fine crumbs. Stir in nuts and reserve.

Prepare batter -- cream butter until fluffy, add sugar and lemon rind and beat well. Add eggs, one at a time, and beat well after each addition. Mix dry ingredients in a separate bowl and then add dry mixture alternately with the sour cream; blending well after each addition. Spread batter evenly over the bottom of a greased 13 x 9 x 2 inch pan. Sprinkle blueberries over batter. Sprinkle reserved topping over blueberries.

Bake at 350 degrees for 30 - 35 minutes. Serve warm.

Serves: 4. Preparation Time: 30 minutes.